php实现的mongodb操作类实例


Posted in PHP onApril 03, 2015

本文实例讲述了php实现的mongodb操作类。分享给大家供大家参考。具体如下:

<?php 
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */ 
class mongo_db { 
  private $config; 
  private $connection; 
  private $db; 
  private $connection_string; 
  private $host; 
  private $port; 
  private $user; 
  private $pass; 
  private $dbname; 
  private $persist; 
  private $persist_key; 
  private $selects = array(); 
  private $wheres = array(); 
  private $sorts = array(); 
  private $limit = 999999; 
  private $offset = 0; 
  private $timeout = 200; 
  private $key = 0; 
  /**
  *
  * CONSTRUCTOR *
  *
  * Automatically check if the Mongo PECL extension has been
  installed/enabled.
  * Generate the connection string and establish a connection
  to the MongoDB.
  */ 
  public function __construct() { 
    if((IS_NOSQL != 1)){ 
      return; 
    } 
    if (!class_exists('Mongo')) { 
      //$this->error("The MongoDB PECL extension has not been installed or enabled", 500); 
    } 
    $configs =wxcity_base::load_config("cache","mongo_db"); 
    $num = count($configs['connect']); 
    $this->timeout = trim($configs['timeout']); 
    $keys = wxcity_base::load_config('double'); 
    $this->key = $keys['mongo_db']; 
    $this->config = $configs['connect'][$this->key]; 
    $status = $this->connect(); 
    if($status == false) 
    { 
      for($i = 1; $i < $num; $i++) 
      { 
        $n = $this->key + $i; 
        $key = $n >= $num ? $n - $num : $n; 
        $this->config = $configs['connect'][$key]; 
        $status = $this->connect(); 
        if($status!=false) 
        { 
          $keys['mongo_db'] = $key ; 
          $this->key = $key; 
          $data = "<?php\nreturn ".var_export($keys, true).";\n?>"; 
          file_put_contents(WHTY_PATH.'configs/double.php', $data, LOCK_EX); 
          break; 
        } 
      } 
    } 
    if($status==false) 
    { 
      die('mongoDB not connect'); 
    } 
  } 
  function __destruct() { 
    if((IS_NOSQL != 1)){ 
      return; 
    } 
    if($this->connection) 
    { 
      $this->connection->close(); 
    } 
  } 
    /**
 *
 * CONNECT TO MONGODB  *
 *
 * Establish a connection to MongoDB using
 the connection string generated in
 * the connection_string() method.
 If 'mongo_persist_key' was set to true in the  
 * config file, establish a persistent connection.
 We allow for only the 'persist'
 * option to be set because we want to 
 establish a connection immediately.
 */ 
  private function connect() { 
    $this->connection_string(); 
    $options = array('connect'=>true,'timeout'=>$this->timeout); 
    try { 
      $this->connection = new Mongo($this->connection_string, $options); 
      $this->db = $this->connection->{$this->dbname}; 
      return($this); 
    } catch (MongoConnectionException $e) { 
      return false; 
    } 
  } 
  /**
  *
  * BUILD CONNECTION STRING *
  *
  * Build the connection string from the config file.
  */ 
  private function connection_string() { 
    $this->host = trim($this->config['hostname']); 
    $this->port = trim($this->config['port']); 
    $this->user = trim($this->config['username']); 
    $this->pass = trim($this->config['password']); 
    $this->dbname = trim($this->config['database']); 
    $this->persist = trim($this->config['autoconnect']); 
    $this->persist_key = trim($this->config['mongo_persist_key']); 
    $connection_string = "mongodb://"; 
    if (emptyempty($this->host)) { 
      $this->error("The Host must be set to connect to MongoDB", 500); 
    } if (emptyempty($this->dbname)) { 
      $this->error("The Database must be set to connect to MongoDB", 500); 
    } if (!emptyempty($this->user) && !emptyempty($this->pass)) { 
      $connection_string .= "{$this->user}:{$this->pass}@"; 
    } if (isset($this->port) && !emptyempty($this->port)) { 
      $connection_string .= "{$this->host}:{$this->port}"; 
    } else { 
      $connection_string .= "{$this->host}"; 
    } $this->connection_string = trim($connection_string); 
  } 
  /**
  *
  * Switch_db  *
  *
  * Switch from default database to a different db
  */ 
  public function switch_db($database = '') { 
    if (emptyempty($database)) { 
      $this->error("To switch MongoDB databases, a new database name must be specified", 500); 
    } $this->dbname = $database; 
    try { 
      $this->db = $this->connection->{$this->dbname}; 
      return(TRUE); 
    } catch (Exception $e) { 
      $this->error("Unable to switch Mongo Databases: {$e->getMessage()}", 500); 
    } 
  } 
  /**
  *
  * SELECT FIELDS  *
  *
  * Determine which fields to include OR which to
  exclude during the query process.
  * Currently, including and excluding at 
  the same time is not available, so the
  * $includes array will take precedence over
  the $excludes array.
  If you want to
  * only choose fields to exclude,
  leave $includes an empty array().
  *
  * @usage: $this->mongo_db->select(array('foo', 'bar'))->get('foobar');
  */ 
  public function select($includes = array(), $excludes = array()) { 
    if (!is_array($includes)) { 
      $includes = array(); 
    } 
    if (!is_array($excludes)) { 
      $excludes = array(); 
    } 
    if (!emptyempty($includes)) { 
      foreach ($includes as $col) { 
        $this->selects[$col] = 1; 
      } 
    } else { 
      foreach ($excludes as $col) { 
        $this->selects[$col] = 0; 
      } 
    } return($this); 
  } 
  /**
  *
  * WHERE PARAMETERS   *
  *
  * Get the documents based on these
  search parameters. The $wheres array should
  * be an associative array with the field 
  as the key and the value as the search
  * criteria.  *
  * @usage = $this->mongo_db->where(array('foo' => 'bar'))->get('foobar');
  */ 
  public function where($wheres = array()) { 
    foreach ((array)$wheres as $wh => $val) { 
      $this->wheres[$wh] = $val; 
    } return($this); 
  } 
  /**
  *
  * WHERE_IN PARAMETERS *
  *
  * Get the documents where the value 
  of a $field is in a given $in array().
  *
  * @usage = $this->mongo_db->where_in('foo', array('bar', 'zoo', 'blah'))->get('foobar');
  */ 
  public function where_in($field = "", $in = array()) { 
    $this->where_init($field); 
    $this->wheres[$field]['$in'] = $in; 
    return($this); 
  } 
  /**
  *
  * WHERE_NOT_IN PARAMETERS *
  *
  * Get the documents where the value of 
  a $field is not in a given $in array().
  *
  * @usage = $this->mongo_db->where_not_in('foo', array('bar', 'zoo', 'blah'))->get('foobar');
  */ 
  public function where_not_in($field = "", $in = array()) { 
    $this->where_init($field); 
    $this->wheres[$field]['$nin'] = $in; 
    return($this); 
  } 
  /**
  *
  * WHERE GREATER THAN PARAMETERS  *
  *
  * Get the documents where the value of 
  a $field is greater than $x
  * 
  * @usage = $this->mongo_db->where_gt('foo', 20);
  */ 
  public function where_gt($field = "", $x) { 
    $this->where_init($field); 
    $this->wheres[$field]['$gt'] = $x; 
    return($this); 
  } 
  /**
  *
  * WHERE GREATER THAN OR EQUAL TO PARAMETERS  *
  *
  * Get the documents where the value of a $field is greater than or equal to $x
  *
  * @usage = $this->mongo_db->where_gte('foo', 20);
  */ 
  public function where_gte($field = "", $x) { 
    $this->where_init($field); 
    $this->wheres[$field]['$gte'] = $x; 
    return($this); 
  } 
  /**
  *
  * WHERE LESS THAN PARAMETERS  *
  *
  * Get the documents where the value of
  a $field is less than $x
  *
  * @usage = $this->mongo_db->where_lt('foo', 20);
  */ 
  public function where_lt($field = "", $x) { 
    $this->where_init($field); 
    $this->wheres[$field]['$lt'] = $x; 
    return($this); 
  } 
  /**
  *
  * WHERE LESS THAN OR EQUAL TO PARAMETERS  *
  *
  * Get the documents where the value of 
  a $field is less than or equal to $x
  *
  * @usage = $this->mongo_db->where_lte('foo', 20);
  */ 
  public function where_lte($field = "", $x) { 
    $this->where_init($field); 
    $this->wheres[$field]['$lte'] = $x; 
    return($this); 
  } 
  /**
  *
  * WHERE BETWEEN PARAMETERS   *
  *
  * Get the documents where the value of
  a $field is between $x and $y
  *
  * @usage = $this->mongo_db->where_between('foo', 20, 30);
  */ 
  public function where_between($field = "", $x, $y) { 
    $this->where_init($field); 
    $this->wheres[$field]['$gte'] = $x; 
    $this->wheres[$field]['$lte'] = $y; 
    return($this); 
  } 
  /**
  *
  * WHERE BETWEEN AND NOT EQUAL TO PARAMETERS  *
  *
  * Get the documents where the value of 
  a $field is between but not equal to $x and $y
  *
  * @usage = $this->mongo_db->where_between_ne('foo', 20, 30);
  */ 
  public function where_between_ne($field = "", $x, $y) { 
    $this->where_init($field); 
    $this->wheres[$field]['$gt'] = $x; 
    $this->wheres[$field]['$lt'] = $y; 
    return($this); 
  } 
  /**
  *
  * WHERE NOT EQUAL TO PARAMETERS  *
  *
  * Get the documents where the value of 
  a $field is not equal to $x
  *
  * @usage = $this->mongo_db->where_between('foo', 20, 30);
  */ 
  public function where_ne($field = "", $x) { 
    $this->where_init($field); 
    $this->wheres[$field]['$ne'] = $x; 
    return($this); 
  } 
  /**
  *
  * WHERE OR   *
  *
  * Get the documents where the value of 
  a $field is in one or more values  
  *
  * @usage = $this->mongo_db->where_or('foo', array( 'foo', 'bar', 'blegh' );
  */ 
  public function where_or($field = "", $values) { 
    $this->where_init($field); 
    $this->wheres[$field]['$or'] = $values; 
    return($this); 
  } 
  /**
  *
  * WHERE AND  *
  *
  * Get the documents where the elements match 
  the specified values *
  * @usage = $this->mongo_db->where_and( array ( 'foo' => 1, 'b' => 'someexample' );
  */ 
  public function where_and($elements_values = array()) { 
    foreach ((array)$elements_values as $element => $val) { 
      $this->wheres[$element] = $val; 
    } return($this); 
  } 
  /**
  *
  * WHERE MOD  *
  *
  * Get the documents where $field % $mod = $result *
  * @usage = $this->mongo_db->where_mod( 'foo', 10, 1 );
  */ 
  public function where_mod($field, $num, $result) { 
    $this->where_init($field); 
    $this->wheres[$field]['$mod'] = array($num, $result); 
    return($this); 
  } 
  /**   *    *  Where size *    *  *  Get the documents where the size of a field is in a given $size int *  *  @usage : $this->mongo_db->where_size('foo', 1)->get('foobar'); */ 
  public function where_size($field = "", $size = "") { 
    $this->_where_init($field); 
    $this->wheres[$field]['$size'] = $size; 
    return ($this); 
  } 
  /**
  *
  * LIKE PARAMETERS *
  *
  * Get the documents where the (string) value of 
  a $field is like a value. The defaults
  * allow for a case-insensitive search.   *
  * @param $flags  
  * Allows for the typical regular expression flags:
  *   i = case insensitive
  *   m = multiline
  *   x = can contain comments
  *   l = locale  
  *   s = dotall, "." matches everything, including newlines
  *   u = match unicode
  *
  * @param $enable_start_wildcard
  * If set to anything other than TRUE, a starting line character "^" will be prepended
  * to the search value, representing only searching for a value at the start of
  * a new line.
  *  * @param $enable_end_wildcard 
  * If set to anything other than TRUE, an ending line character "$" will be appended
  * to the search value, representing only searching for a value at the end of
  * a line.
  * 
  * @usage = $this->mongo_db->like('foo', 'bar', 'im', FALSE, TRUE);
  */ 
  public function like($field = "", $value = "", $flags = "i", $enable_start_wildcard = TRUE, $enable_end_wildcard = TRUE) { 
    $field = (string) trim($field); 
    $this->where_init($field); 
    $value = (string) trim($value); 
    $value = quotemeta($value); 
    if ($enable_start_wildcard !== TRUE) { 
      $value = "^" . $value; 
    } if ($enable_end_wildcard !== TRUE) { 
      $value .= "$"; 
    } $regex = "/$value/$flags"; 
    $this->wheres[$field] = new MongoRegex($regex); 
    return($this); 
  } 
  public function wheres($where){ 
    $this->wheres = $where; 
  } 
  /**
  *
  * ORDER BY PARAMETERS *
  *
  * Sort the documents based on the parameters passed.
  To set values to descending order,
  * you must pass values of either -1, FALSE,
  'desc', or 'DESC', else they will be
  * set to 1 (ASC).
  *
  * @usage = $this->mongo_db->where_between('foo', 20, 30);
  */ 
  public function order_by($fields = array()) { 
    if (!is_array($fields) || !count($fields)) return ; 
    foreach ($fields as $col => $val) { 
      if ($val == -1 || $val === FALSE || strtolower($val) == 'desc') { 
        $this->sorts[$col] = -1; 
      } else { 
        $this->sorts[$col] = 1; 
      } 
    } return($this); 
  } 
  /**
  *
  * LIMIT DOCUMENTS *
  *
  * Limit the result set to $x number of documents  *
  * @usage = $this->mongo_db->limit($x);
  */ 
  public function limit($x = 99999) { 
    if ($x !== NULL && is_numeric($x) && $x >= 1) { 
      $this->limit = (int) $x; 
    } return($this); 
  } 
  /**
  *
  * OFFSET DOCUMENTS   *
  *
  * Offset the result set to skip $x number of documents
  *
  * @usage = $this->mongo_db->offset($x);
  */ 
  public function offset($x = 0) { 
    if ($x !== NULL && is_numeric($x) && $x >= 1) { 
      $this->offset = (int) $x; 
    } return($this); 
  } 
  /**
  *
  * GET_WHERE  *
  *  
  * Get the documents based upon the passed parameters  *
  * @usage = $this->mongo_db->get_where('foo', array('bar' => 'something'));
  */ 
  public function get_where($collection = "", $where = array(), $limit = 99999, $orderby=array()) { 
    if (is_array($orderby) || !emptyempty($orderby)) { 
      $order_by = $this->order_by($order_by); 
    } 
    return($this->where($where)->limit($limit)->get($collection)); 
  } 
  public function selectA($collection = "", $limit = 99999, $orderby=array()) { 
    if(intval($limit)<1){ 
      $limit = 999999; 
    } 
    $order_by = $this->order_by($orderby); 
    $re = $this->limit($limit)->get($collection); 
    $this->clear(); 
    return (array)$re; 
  } 
  public function listinfo($collection = "", $orderby=array(), $page=1, $pagesize=12) { 
    $page = max(intval($page), 1); 
    $offset = $pagesize * ($page - 1); 
    $pagesizes = $offset + $pagesize; 
    $this->offset($offset); 
    $order_by = $this->order_by($orderby); 
    $re = $this->limit($pagesize)->get($collection); 
    $this->limit(999999); 
    $count = $this->count($collection); 
    $this->pages = pages($count, $page, $pagesize); 
    return (array)$re; 
  } 
  /**
  *
  * GET *
  *
  * Get the documents based upon the passed parameters  *
  * @usage = $this->mongo_db->get('foo', array('bar' => 'something'));
  */ 
  public function get($collection = "") { 
    if (emptyempty($collection)) { 
      $this->error("In order to retreive documents from MongoDB, a collection name must be passed", 500); 
    } $results = array(); 
    $documents = $this->db->{$collection}->find($this->wheres, $this->selects)->limit((int) $this->limit)->skip((int) $this->offset)->sort($this->sorts); 
    $returns = array(); 
    foreach ($documents as $doc): $returns[] = $doc; 
    endforeach; 
    return($returns); 
  } 
  public function getMy($collection = "") { 
    if (emptyempty($collection)) { 
      $this->error("In order to retreive documents from MongoDB, a collection name must be passed", 500); 
    } $results = array(); 
    $documents = $this->db->{$collection}->find($this->wheres, $this->selects)->limit((int) $this->limit)->skip((int) $this->offset)->sort($this->sorts); 
    $returns = array(); 
    foreach ($documents as $doc): $returns[] = $doc; 
    endforeach; 
    $this -> clear(); 
    return($returns); 
  } 
  /**
  *
  * COUNT  *
  *
  * Count the documents based upon the passed parameters *
  * @usage = $this->mongo_db->get('foo');
  */ 
  public function count($collection = "") { 
    if (emptyempty($collection)) { 
      $this->error("In order to retreive a count of documents from MongoDB, a collection name must be passed", 500); 
    } $count = $this->db->{$collection}->find($this->wheres)->limit((int) $this->limit)->skip((int) $this->offset)->count(); 
    $this->clear(); 
    return($count); 
  } 
  /**
  *
  * INSERT  *
  *
  * Insert a new document into the passed collection *
  * @usage = $this->mongo_db->insert('foo', $data = array());
  */ 
  public function insert($collection = "", $data = array(), $name='ID') { 
    if (emptyempty($collection)) { 
      $this->error("No Mongo collection selected to insert into", 500); 
    } if (count($data) == 0 || !is_array($data)) { 
      $this->error("Nothing to insert into Mongo collection or insert is not an array", 500); 
    } try { 
    /**
      wxcity_base::load_sys_class('whtysqs','',0); 
      $mongoseq_class = new whtysqs('creaseidsqs');
      $re = $mongoseq_class->query("?name=" . $collection . "&opt=put&data=1");
    **/ 
      $re = put_sqs('list_mongo_creaseidsqs','1'); 
      if(is_numeric($re)){ 
        $re++; 
        $data[$name] = intval($re); 
      }else{ 
        $data[$name] = intval(time()); 
        //die('mongosqs error'); 
      } 
      $this->db->{$collection}->insert($data, array('fsync' => TRUE)); 
      $this->clear(); 
      return $data[$name]; 
    } catch (MongoCursorException $e) { 
      $this->error("Insert of data into MongoDB failed: {$e->getMessage()}", 500); 
    } 
  } 
  public function insertWithId($collection = "", $data = array()) { 
    if (emptyempty($collection)) { 
      $this->error("No Mongo collection selected to insert into", 500); 
    } if (count($data) == 0 || !is_array($data)) { 
      $this->error("Nothing to insert into Mongo collection or insert is not an array", 500); 
    } try { 
      $this->db->{$collection}->insert($data, array('fsync' => TRUE)); 
      $this->clear(); 
      return 1; 
    } catch (MongoCursorException $e) { 
      $this->error("Insert of data into MongoDB failed: {$e->getMessage()}", 500); 
    } 
  } 
  /**
  *
  * UPDATE  *
  *
  * Update a document into the passed collection *
  * @usage = $this->mongo_db->update('foo', $data = array());
  */ 
  public function update($collection = "", $data = array()) { 
    if (emptyempty($collection)) { 
      $this->error("No Mongo collection selected to update", 500); 
    } if (count($data) == 0 || !is_array($data)) { 
      $this->error("Nothing to update in Mongo collection or update is not an array", 500); 
    } try { 
      $this->db->{$collection}->update($this->wheres, array('$set' => $data), array('fsync' => TRUE, 'multiple' => FALSE)); 
      $this->clear(); 
      return(TRUE); 
    } catch (MongoCursorException $e) { 
      $this->error("Update of data into MongoDB failed: {$e->getMessage()}", 500); 
    } 
  } 
  /**
  *
  * UPDATE_ALL  *
  *
  * Insert a new document into the passed collection *
  * @usage = $this->mongo_db->update_all('foo', $data = array());
  */ 
  public function update_all($collection = "", $data = array()) { 
    if (emptyempty($collection)) { 
      $this->error("No Mongo collection selected to update", 500); 
    } if (count($data) == 0 || !is_array($data)) { 
      $this->error("Nothing to update in Mongo collection or update is not an array", 500); 
    } try { 
      $this->db->{$collection}->update($this->wheres, array('$set' => $data), array('fsync' => TRUE, 'multiple' => TRUE)); 
      return(TRUE); 
    } catch (MongoCursorException $e) { 
      $this->error("Update of data into MongoDB failed: {$e->getMessage()}", 500); 
    } 
  } 
  /**
  *
  * DELETE  *
  *
  * delete document from the passed collection based upon certain criteria *
  * @usage = $this->mongo_db->delete('foo', $data = array());
  */ 
  public function delete($collection = "") { 
    if (emptyempty($collection)) { 
      $this->error("No Mongo collection selected to delete from", 500); 
    } try { 
      $this->db->{$collection}->remove($this->wheres, array('fsync' => TRUE, 'justOne' => TRUE)); 
      $this->clear(); 
      return(TRUE); 
    } catch (MongoCursorException $e) { 
      $this->error("Delete of data into MongoDB failed: {$e->getMessage()}", 500); 
    } 
  } 
  /**
  *
  * DELETE_ALL  *
  *
  * Delete all documents from the passed collection based upon certain criteria
  *
  * @usage = $this->mongo_db->delete_all('foo', $data = array());
  */ 
  public function delete_all($collection = "") { 
    if (emptyempty($collection)) { 
      $this->error("No Mongo collection selected to delete from", 500); 
    } try { 
      $this->db->{$collection}->remove($this->wheres, array('fsync' => TRUE, 'justOne' => FALSE)); 
      return(TRUE); 
    } catch (MongoCursorException $e) { 
      $this->error("Delete of data into MongoDB failed: {$e->getMessage()}", 500); 
    } 
  } 
  /**
  *
  * ADD_INDEX  *
  *
  * Ensure an index of the keys in a collection with optional parameters.
  To set values to descending order,
  * you must pass values of either -1, FALSE, 'desc', or 'DESC', else they will be
  * set to 1 (ASC). *
  * @usage = $this->mongo_db->add_index($collection, array('first_name' => 'ASC', 'last_name' => -1), array('unique' => TRUE));
  */ 
  public function add_index($collection = "", $keys = array(), $options = array()) { 
    if (emptyempty($collection)) { 
      $this->error("No Mongo collection specified to add index to", 500); 
    } if (emptyempty($keys) || !is_array($keys)) { 
      $this->error("Index could not be created to MongoDB Collection because no keys were specified", 500); 
    } foreach ($keys as $col => $val) { 
      if ($val == -1 || $val === FALSE || strtolower($val) == 'desc') { 
        $keys[$col] = -1; 
      } else { 
        $keys[$col] = 1; 
      } 
    } if ($this->db->{$collection}->ensureIndex($keys, $options) == TRUE) { 
      $this->clear(); 
      return($this); 
    } else { 
      $this->error("An error occured when trying to add an index to MongoDB Collection", 500); 
    } 
  } 
  /**
  *
  * REMOVE_INDEX   *
  *
  * Remove an index of the keys in a collection.
  To set values to descending order,
  * you must pass values of either -1, FALSE, 'desc', or 'DESC', else they will be
  * set to 1 (ASC). *
  * @usage = $this->mongo_db->remove_index($collection, array('first_name' => 'ASC', 'last_name' => -1));
  */ 
  public function remove_index($collection = "", $keys = array()) { 
    if (emptyempty($collection)) { 
      $this->error("No Mongo collection specified to remove index from", 500); 
    } if (emptyempty($keys) || !is_array($keys)) { 
      $this->error("Index could not be removed from MongoDB Collection because no keys were specified", 500); 
    } if ($this->db->{$collection}->deleteIndex($keys, $options) == TRUE) { 
      $this->clear(); 
      return($this); 
    } else { 
      $this->error("An error occured when trying to remove an index from MongoDB Collection", 500); 
    } 
  } 
  /**
  *
  * REMOVE_ALL_INDEXES  *
  *
  * Remove all indexes from a collection. *
  * @usage = $this->mongo_db->remove_all_index($collection);
  */ 
  public function remove_all_indexes($collection = "") { 
    if (emptyempty($collection)) { 
      $this->error("No Mongo collection specified to remove all indexes from", 500); 
    } $this->db->{$collection}->deleteIndexes(); 
    $this->clear(); 
    return($this); 
  } 
  /**
  *
  * LIST_INDEXES   *
  *
  * Lists all indexes in a collection. *
  * @usage = $this->mongo_db->list_indexes($collection);
  */ 
  public function list_indexes($collection = "") { 
    if (emptyempty($collection)) { 
      $this->error("No Mongo collection specified to remove all indexes from", 500); 
    } return($this->db->{$collection}->getIndexInfo()); 
  } 
  /**
  *
  * DROP COLLECTION *
  *
  * Removes the specified collection from the database.
  Be careful because this
  * can have some very large issues in production!
  */ 
  public function drop_collection($collection = "") { 
    if (emptyempty($collection)) { 
      $this->error("No Mongo collection specified to drop from database", 500); 
    } $this->db->{$collection}->drop(); 
    return TRUE; 
  } 
  /**
  *
  * CLEAR  *
  *
  * Resets the class variables to default settings
  */ 
  private function clear() { 
    $this->selects = array(); 
    $this->wheres = array(); 
    $this->limit = NULL; 
    $this->offset = NULL; 
    $this->sorts = array(); 
  } 
  /**
  *
  * WHERE INITIALIZER  *
  *
  * Prepares parameters for insertion in $wheres array().
  */ 
  private function where_init($param) { 
    if (!isset($this->wheres[$param])) { 
      $this->wheres[$param] = array(); 
    } 
  } 
  public function error($str, $t) { 
    echo $str; 
    exit; 
  } 
} 
?>

使用范例:

$table_name=trim(strtolower($this->table_name)); 
$this->mongo_db->where($where); 
$order=!emptyempty($order)?array('AID'=>'DESC'):array('AID'=>'ASC');
//升序降序 
$infos=$this->mongo_db->listinfo($table_name,$order,$page,$pagesize);

希望本文所述对大家的php程序设计有所帮助。

PHP 相关文章推荐
在PHP中使用与Perl兼容的正则表达式
Nov 26 PHP
phpMyAdmin 链接表的附加功能尚未激活的问题
Aug 01 PHP
PHPCMS的使用小结
Sep 20 PHP
php 缩略图实现函数代码
Jun 23 PHP
php设计模式之命令模式使用示例
Mar 02 PHP
PHP防范SQL注入的具体方法详解(测试通过)
May 09 PHP
PHP图片等比例缩放生成缩略图函数分享
Jun 10 PHP
php ci框架中加载css和js文件失败的原因及解决方法
Jul 29 PHP
php中使用gd库实现下载网页中所有图片
May 12 PHP
PHP中把有符号整型转换为无符号整型方法
May 27 PHP
Laravel5中防止XSS跨站攻击的方法
Oct 10 PHP
浅谈php和js中json的编码和解码
Oct 24 PHP
PHP中判断文件存在使用is_file还是file_exists?
Apr 03 #PHP
php专用数组排序类ArraySortUtil用法实例
Apr 03 #PHP
Win7下手动安装apache2.2、php5.4笔记
Apr 03 #PHP
PHP中返回引用类型的方法
Apr 03 #PHP
PHP中应该避免使用同名变量(拆分临时变量)
Apr 03 #PHP
PHP5多态性与动态绑定介绍
Apr 03 #PHP
php5.4以上版本GBK编码下htmlspecialchars输出为空问题解决方法汇总
Apr 03 #PHP
You might like
解析php通过cookies获取远程网页的指定代码
2013/06/25 PHP
php正则表达式基本知识与应用详解【经典教程】
2017/04/17 PHP
如何在centos8自定义目录安装php7.3
2019/11/28 PHP
php7 图形用户界面GUI 开发示例
2020/02/22 PHP
JavaScript 打地鼠游戏代码说明
2010/10/12 Javascript
JavaScript创建对象的写法
2013/08/29 Javascript
JS 数字转换研究总结
2013/12/26 Javascript
jQuery实现仿Alipay支付宝首页全屏焦点图切换特效
2015/05/04 Javascript
最佳的JavaScript错误处理实践
2016/07/16 Javascript
vue.js入门教程之基础语法小结
2016/09/01 Javascript
原生js获取浏览器窗口及元素宽高常用方法集合
2017/01/18 Javascript
Angular.js去除页面中显示的空行方法示例
2017/03/30 Javascript
ES6字符串模板,剩余参数,默认参数功能与用法示例
2017/04/06 Javascript
微信小程序page的生命周期和音频播放及监听实例详解
2017/04/07 Javascript
js实现文字列表无缝滚动效果
2017/06/23 Javascript
利用Vue实现移动端图片轮播组件的方法实例
2017/08/23 Javascript
基于node.js的fs核心模块读写文件操作(实例讲解)
2017/09/10 Javascript
fullpage.js最后一屏滚动方式
2018/02/06 Javascript
nodeJs实现基于连接池连接mysql的方法示例
2018/02/10 NodeJs
微信小程序动态生成二维码的实现代码
2018/07/25 Javascript
ng-events类似ionic中Events的angular全局事件
2018/09/05 Javascript
详解javascript设计模式三:代理模式
2019/03/25 Javascript
解决Layui 表格自适应高度的问题
2019/11/15 Javascript
从零开始学Python第八周:详解网络编程基础(socket)
2016/12/14 Python
Python数据结构与算法(几种排序)小结
2019/06/22 Python
pandas DataFrame的修改方法(值、列、索引)
2019/08/02 Python
python super用法及原理详解
2020/01/20 Python
NBA欧洲商店(西班牙):NBA Europe Store ES
2019/04/16 全球购物
设计师求职信
2014/07/01 职场文书
恋恋笔记本观后感
2015/06/16 职场文书
优秀共产党员事迹材料2016
2016/02/29 职场文书
2016年离婚协议书范文
2016/03/18 职场文书
2019新学期家长会工作计划
2019/08/21 职场文书
Pytest之测试命名规则的使用
2021/04/16 Python
golang如何去除多余空白字符(含制表符)
2021/04/25 Golang
Mysql排序的特性详情
2021/11/01 MySQL